High Rise Condo Thermostat Change

Alright guys thanks again for all you help with all my other projects.

I need to change my thermostat in my condo unit, figured i can just buy one off the shelf at Home depot. Now this is the confusing part, I don't pay for heat/AC, its included in my condo fee. The condominium also controls hot/cold. They tell us when the heat is on for winter and when the A/C is on for summer and we can only control the blower speed and how hot we want it or cold.

My thermostat is really old unit. I've attached a pic below. The condo was built in 1975. The thermostat is made my McQuay. When i remove the face plate i see 3 wires. brown, yellow and red. Do I just purchase a normal thermostat from Home depot or do i have to get a specific thermostat that is designed for a condo. thanks in advance